Crappy music? Poorly made...lots of autotune with people who CAN'T SING singing it.

Bad country music. Twangy stuff... And especially if it includes yodeling in any way or form.
Billy Ray Cyrus's stuff....sorry people but I don't like it.. at ALL.
Most hip-hop
Some rap music...ehh some of it, I like eminem but most of it I don't like.